The air around you is pressing in on you with tremendous force. At sea level where I live , the air presses in on you with It also presses on the glass and on the water in the glass. While the straw is just sitting in the glass. The air pressure is the same inside and out. When you drink through the straw, you seal your lips against the straw and then you use your lungs and mouth to reduce the air pressure in your mouth.
You do this by expanding your mouth or lungs. There is now more space to contain the same amount of air, so the air pressure is less. At this point, the air pressure in your mouth is lower than the air pressure surrounding you. Your mouth is connected to the straw, so the air pressure inside the straw is lowered as well. There is the same amount of pressure on the outside, but there is less pressure on the inside. What happens if you cover the hole with your finger and then try to drink? When you suck on a straw that has a hole, you pull air through the hole, instead of removing air from the straw.
The liquid stays put, unless you cover the hole. Put the index card on top, making sure that the card completely covers the cup. Put the palm of your hand on top of the card to hold it on and turn the cup over. When the cup is completely upside down, take your hand away. What happens to the card? To the water? Do this over a tub or sink, just in case!
Is your new straw functioning properly? Does it get harder to suck up water? Keep adding prepared straws and testing after each addition. You might have to carefully stand on a chair to test your growing mega-straw. Does it become harder and harder to suck up water as you stand higher and higher above the glass?
Once you have connected a few straws together and it becomes a little challenging to drink with the straw, test your mega-straw at different angles. In addition to holding the straw vertically, test it at an angle about halfway between horizontal and vertical approximately 45 degrees as well as by holding it as close to horizontal as possible. Note that you might need to add more water to your glass to test a fairly horizontal position.
Is there a difference in effort needed to suck up water? If so, rank the straw positions in descending order: 1 being the hardest to suck up water, or needing most effort; 3 being the easiest, or needing the least effort. Note that you did not change the distance over which the water was transported; the straw stayed the same length.
What did you change that might have created a difference in effort needed? Pause a moment and think about how the difference in height between your mouth and the glass changed depending on the angle at which you held the mega-straw. Rank the methods in descending order of difference in height between your mouth and the glass: 1 being the position with the most height; 3, the position with the least height. Do you see a correlation between the difference in height and the effort you needed to suck up water?
If you have bendable sections in your straw, test what happens if you keep the height of your glass and your head the same but change the way you bend the mega-straw. Try a straight mega-straw and a mega-straw with one or several kinks. How do the levels of effort compare now that you keep the difference in height unchanged? Build on. How many straws can you connect before you can no longer drink from it if held vertically?
Do you think there is a limit or would you be able to build on indefinitely, as long as you could test it from higher and higher places? Extra : Test with different types of straws, such as ones that are wide or very narrow. Would one type be more suited to make a mega-straw? Build a Cooler. Get smart. I have to say I used to have so much space in my throat that my friends used to make fun of me and say we can see up to your stomach when you open your mouth.
I was getting worried for this and it started to make me find out why this happened. I was researching online and came across this article. I was thinking this caused by straw as I consume so much liquid drinking from the straw. My throat muscles had to work harder to get the fluid up to the straw and in to my mouth. I also developed some wrinkles around my mouth. If you are considering drinking from your straw as your daily routine you should think twice.
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